License plate location method based on modified HSI model of color image

Author

Zhangfan, Cheng ; Rongbao, Chen

Author_Institution

Sch. of Electr. Eng. & Autom., HeFei Univ. of Technol., Hefei, China

fYear

2009

fDate

16-19 Aug. 2009

Abstract

License plate locating is the key of license plate recognition in Intelligent traffic system. License plate location method based on modified HSI model of color image is proposed in this paper. Firstly, we preprocess image, including image compression and filtering; Candidate regions of vehicle license plate are detected by using modified HSI model, which is transformed from RGB model; finally, we validate the candidate according to the texture feature of license plates and prior knowedge. In this way, vehicle license plate can be accurately located. Test shows the license plate location rate of success is 95.1%, and average processing rate is 0.035 second per frame, which meets the requirements of processing rate in real-time system.

Keywords

data compression; image coding; image colour analysis; traffic engineering computing; RGB model; color image; filtering; image compression; intelligent traffic system; license plate location method; modified HSI model; vehicle license plate; Character recognition; Color; Filtering; Flowcharts; Image coding; Instruments; Intelligent systems; Licenses; Traffic control; Vehicles; modified HSI model; prior knowedge; texture feature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-3863-1

Electronic_ISBN

978-1-4244-3864-8

Type

conf

DOI

10.1109/ICEMI.2009.5274105

Filename

5274105